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Materials Data on CoBW by Materials Project

WCoB crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. W2+ is bonded to five equivalent B3- atoms to form distorted WB5 trigonal bipyramids that share corners with eight equivalent CoB4 tetrahedra, corners with eight equivalent WB5 trigonal bipyramids, edges with six equivalent CoB4 tetrahedra, and edges with six equivalent WB5 trigonal bipyramids. There are a spread of W–B bond distances ranging from 2.38–2.43 Å. Co1+ is bonded to four equivalent B3- atoms to form CoB4 tetrahedra that share corners with eight equivalent CoB4 tetrahedra, corners with eight equivalent WB5 trigonal bipyramids, edges with two equivalent CoB4 tetrahedra, and edges with six equivalent WB5 trigonal bipyramids. There are a spread of Co–B bond distances ranging from 2.10–2.22 Å. B3- is bonded in a 9-coordinate geometry to five equivalent W2+ and four equivalent Co1+ atoms.

36 MATERIALS SCIENCE↗

Zng1 is a GTP-dependent zinc transferase needed for activation of methionine aminopeptidase

The evolution of zinc (Zn) as a protein cofactor altered the functional landscape of biology, but dependency on Zn also created an Achilles' heel, necessitating adaptive mechanisms to ensure Zn availability to proteins. A debated strategy is whether metallochaperones exist to prioritize essential Zn-dependent proteins. Here, we present evidence for a conserved family of putative metal transferases in human and fungi, which interact with Zn-dependent methionine aminopeptidase type I (MetAP1/Map1p/Fma1). Deletion of the putative metal transferase in Saccharomyces cerevisiae (ZNG1; formerly YNR029c) leads to defective Map1p function and a Zn-deficiency growth defect. In vitro, Zng1p can transfer Zn 2+ or Co 2+ to apo-Map1p, but unlike characterized copper chaperones, transfer is dependent on GTP hydrolysis. Proteomics reveal mis-regulation of the Zap1p transcription factor regulon due to loss of ZNG1 and Map1p activity, suggesting that Zng1p is required to avoid a compounding effect of Map1p dysfunction on survival during Zn limitation.

59 BASIC BIOLOGICAL SCIENCES↗